Steam-engine valve-gear.



W. S. BROWN.

STEAM ENGINE VALVE GEAR.

APPLICATION FILED AUG.14, 1913.

1 1 1 0,287, Patented Sept. 8, 1914.,

. 2 SHEETS-sHBET 1- L U LJRNQQQ W. S. BROWN.

STEAM ENGINE VALVE GEAR.

APPLIUATION TILED AUG. 14, 1013.

1 1 1 0,287. Patented Sept. 8, 1914.

2 SHEETSSHEET 2!- :28- 4 37 22 76 76 22 wblmwow;

ward of the main crank. On

WILLIAM SHERMAN BROWN,

STEAM-ENGINE VALVE-GEAR,

Specification of Letters Yatent, Application filed August 14, 1913.Serial No. 784,735

0]? KNOXVILLE, TENNESSEE.

To all whom it may concern:

Be it known that I, WVILLIAM SHERMAN Brown, a citizen of the UnitedStates, re-' siding at Knoxville, in the county of Knoxand State ofTennessee, have invented a new and useful Im rovement in-Steam-EngineValve-Gear, 0 which the following is a specification, reference being.had to the accompanying drawing.

My improvement relates particularl to mechanism for transmitting motionrom the crank of a drive wheel of a steam loco motive to thedistributing valve'which admits steam to the cylinder.

The object of the improvement is to provide a construct-ion which issimple, has the parts accessibly located, and avoids irregularity ofvalve action due to lost motion or pounding at the crank.

This improvement is a modification of the mechanism described by myUnited States Patent Jo. 1,033,032, granted July 23, 1912, forsteam-engine valve-gear In the accompanying drawings, Figure 1 is a sideelevation, portions being broken away, showing my improvement applied toone side of a locomotive; Fig. 2 is a plan of a portion of the mechanismshown by Fig. 1; Fig. 3 is a section on the line3-3, of Fig. 1 lookingtoward the right, the slideblock being in its middle position; Fig. 4

a section on the line, 4-4, of Fig. 1 lookguid bolts, 9. The innermostof said bolt-sextend ing toward the right; Fig. 5 is a plan of a bridge;Fig. 6 is a side elevation of said bridge. I 1

Referring to said drawings, 1, is the usual valve stemextending to thedistributing valve (not shown). The usual horizontal, parallelcross-head guide bars, 2, are supported at their rear ends by the. guideyoke extension, 3. The usual connecting rod or pitman. 4, is coupled tothe usual main crank, 55, carried by a drive wheel, D. On the maincrank, 5. is rigidly mounted a first auxiliary crank. 6, standing 00degrees forsaid first auxilia v crank is a second auxiliary crank. 7,standing 90 degrees back of the first auxiliary crank and on the radiusof the main crank. V

A bridge. 13. is located above the frame. A. and extends from theordinarv guide yoke. 8. and guide-vnke extension. 3. the

crossbcam or plate, 10, and is secured to said guide yoke and to saidcross-beam by means of bolts, 9. Said, bridge is in the form of a platehaving its length horizontal and being turned to Y into an uprightplane. At its real-end, the bridge has a lateral extension, 11, restingagainst the cross-beam, 10, andreceiving said bolts, 9. At its forwardend' the'bridge has a transverse extension, 12, reaching to both sidesof the body of the bridge and resting against the guide yoke, 8, and thee yoke extension, '3, and receiving said Patented Sept. s, 1914.

bring its long edges through the transverse extension, 12, and

the guide yoke, 8, while the others of said bolts extend through saidmember" and throngh'theguide yoke, 8, and theguide yoke extension, 3.

"On the'onter portion of member, 12, and integral therewith is an ear,13, which is directed rearward; and on the inner portion of saidtransverse member is another car. 14. also d rected rearward and locatedhorizontally oppositethe' ear,-

13. Each of said cars has a bearing, 15, receiving the ends of a shaft,16. On said shaft is a bell crank or rockingmember, F, preferablyrotatable onsaid shaft, the latter being held immovably in its bearings.,Said bell crank has an approximately horizontal arm, 17, and adepending arm, 18. On the upper edge of the bridge. B, are horizontalbosses, 2 0. A segment, E, has at each end a foot. 21, resting upon oneofthe bosses, 20; and bolts, 22, extend through said feet and saidbosses and secure said segment rigidly upon the bridge. B. Said segmentis in the form of a plate having its body set in an upright plane. Insaid segment is a curved. slot. 23. in which rests a slide block, 24, towhich is coupled the upper end of an approximately upright link. 25. Thelower end of said linkis. coupled to the forward end of'the firstal-ixiliarypitman rod. 26, by a bolt. 27. The rear end of said pitmanrod is coupled to the first aux.- iliary crank. The slot; 23, madeconcentric with an axis which approximately intersects a linewhich is anextension of the cylinder axis and cutsv the axis of the drive wheel. D:and the'length of said link. 25. is such as. to allow the axis of saidbolt. 17. to be coincident with the axis to 'which said slot isconcen'tric. An apis preferably the transverse tiallv as described. 1

1 ter. a second movable member on said first outerside of a'drive'wheelfor rocking said rocking member,

: .bination of avalv'est'em, reversing mechastem, -"means in drive wheeland a drive wheel for lation with the outer bination of a valve stem,

a moving said rocking member forward and relation with the outer side ofa'drive wheel. for rocking said rock ng bination of'a valve stem,

' la tion with a drive wheel 0nd. movable member for substantially asdescribed.

adrive wheel and with described. v -5. In asteam engine valve gear, the.com-

I'nism, a rocking member connected with said stem, means in operativerelation with said a reversing mechanism for bodily moving said rockingmemberzforward and backward, and

' movable side of a drive wheel for. rocking said rocking member,substan} 2. In asteam engine'valve geanthe coma rockingmember connectedwith'said stem, means in opera tive relation with a drive wheel forbodilv backward. and other means also in operative member, substam.tiall'vas described. f 1 p In a steam engine valve gear, the co1n-. afirst movable member, means in operative relation with the outerside of'adrive wheel and with said movable" member for moving the'latmovablemember and connected with the valve stem, and means also in operativereand withsaid secmoving the latter.

4. In a steam engine valve gear, the combination of a valve stem, arocking member connected with said stem, means in operative andreversing. mechanism for variably bodily moving said rocking memberforward and backward, and other means also in operative relation with vsaid rocking mem-. her for rocking the lat bination of a valve stem,reversing. mecha other means in operative relation with thesubstantially as described.

6. r n a steam e gine valve gear, the commounted onsaid with the valve.movable member, I .9. In a steam engine valve gear, the comvtlie otherhaving its upper end .in operative er, substantially as binationofauxiliary rod ,..lower end coupledto the auxiliary one having its upperend coupled to'sald re- :versing mechanism and the other having its-.ber,.substantially as described.

' bination' of ward andbackwardand other means also in operativerelation with the outer side of rocking said IfOcking mem ber.substantially as described.

7. In a. steam engine bination of a valve stem, reversing;mechanism,.afirst movablemember, means in op valve gear, the comerative relationwithra drive wheel and said reversing mechanism and said movable memberfor moving the latter, a second member mounted on said first mov ablemember and connected with the valve stem, and means also in operativerelation with a drive wheel and with said second movable member formoving the latter, substantially as described.

8. In a steam engine valve gear, the combridgepiece,

bination of a valve stenna bell crank, reversing mechanism, means inoperatlve rel? 'tion with-said reversing mechanism for rocking saidbellcrank, a movable member bell crank and connected stem, and means inoperative relation-with a drive wheel for moving said substantially asdescribed.

bination of avalve stem, a bell crank, means for rocking said bellcrank, a movable member mounted on said bell crank and connected withthe valve stem, and means in operative relation with a drive wheel formoving said mo able member, substantially as de- 3 scribed.

10. Ina steamengine valve gear, the combination of reversing mechanism,a first movable member, a valve stem, an auxiliary crank, an auxiliaryrod coupled to said 8'5 crank, two approximately upright links eachhaving its lower end coupled to the auxiliary rod and, one having itsupper end coupled to said reversing mechanism and relation wlth saidfirst movable member, a second movable member mounted on said firstmovable. member in operative relation with the valve stem, and means inoperative relation with a drive wheel and said second movable member,substantially as described.

11, In a steamengine valve gear, the comreversing mechanism, a valvecrank, an auxiliary crank, an coupled to said crank, two apo proximatelyupright links each having its rod and stem, a bell upper end coupled tosaid bell crank, a sec- 5 movable member mounted on said bell crank andinoperative relation with the valve stem, and means in operativerelation with a drive wheel and said movable mem- Ina steam engine valvegear, the coman approximately hori aontal bridge-piecc, reversingmechanism,- fifirst movable member, a valve stem, an auxiliary crank, anauxiliary rod coupled to said ,cra-nk, two approximately uprightlinkseach having its lower end coupled to the auxiliary rod and one havingits upper end coupled to said reversing mechanism and the other havingits upper end in operative relation with said first movable member, asecond movable member mounted on said 7 first movable member and inoperative relation with the valvestem, and means in operative relationwith a drive wheel and said second movable member, substantially asdescribed.

, 13. In a steam engine valve gear, the combination of an approximatelyhorizontal reversing mechanism, a first movable member, a valve stem, abell crank,

] an auxiliar'y'crank, an auxiliary rod coupled to saidcrank, twoapproximatel upright links each" having its lower en cu i f pledto theauxiliary'rod and one having its upper end coupled to said first movablememberand' the other having its upper end '14. In a steam enginevalvegear, the

J 5 Combination ofa valve stem, a slide block,

meahsfor-moving said block, an auxiliary crank an auxiliary rod :coupledtosaid crank, a' first movable member, .two approximately" upright linkseach having its lower end coupled to the auxiliary rod and one havingits upper end coupled. to said slide block and the other having itsupper *endin operativerelation' with saidmovable memberyasecond movablemember mounted on'said first movable member and connected with the valvestem, and means in operative relation with a drive wheel for moving saidsecond movable -member, substantially as described}.

0 15211111 steam'engine valve gear, the combination of avalve stem, aslide block, means for moving said block, a bell crank, amovablemembermounted on said bell crank and connected with the valve stem, anauxiliary l3 .5 'crankyanj auxiliary rod coupled to said. crank,twoapproximately upright links each having its lower end coupled to theauxiliary 1 rod and-ronehaving its upper end coupled tOsaidslide blockand thev other having its 40 upper end coupled to said bell crank, and.

r means" in operative relation with a, drive wheel for moving saidsecond movable member, substantially as described.

-"16.-, Inna steam engine. valve gear,

the A5 combination of avalve stem, an gapproxi mately horizontalbridge-piece forming a slide'way, a slide block on said slide way, imeans for moving said slide block, a first movable member, a. secondmovable member mounted on said first In ovable'member and is connectedwith the valve stem, an auxiliary crank, an. auxiliary rod coupled tosaid crank, two approximately upright links each-having'its lower endcoupled to the auxiliary rod and. one having its upper end {coupled tosaid slide block and the other having its upper end in operativerelation with said first movable member and means inoperative relationwith a drive wheel for mov ng said second movable member, sub=stantially as described.

-17. In a steam engine valve gear, a. combination of a valve stem, anapproximately horizontal bridge-piece forming-a slide way, a' slideblock on said slide way, means for moving said slide block, a bellcrank, a movable member mountedon said bell crank and in operativerelation with the-valve stem,

an auxiliary crank, an auxiliary rod coupled to said crank, twoapproximately upright links each having its lower end coupled to theauxiliary, rod and one having its upper end coupled to the slide blockand the other having its'upper end coupled to the bell crank, andmeansin. operative relation with a drive wheel for moving said movable.member, substantially as described. I i o i 18."In a steam engine valvegear, the combination ofa valve stem, a bracket, a bell crank hinged tosaid bracket, a movable membermounted on said bell crank andin operativerelation with the valve stem, a slide block, means for-supporting saidslide block, means for moving saidslide block, an auxiliary crank, anauxiliary rod on said auxiliary crank, two approximately upright linkseach having its lower end coupled tolsaid auxiliary rod and one'havingits upper. end coupled to said slide block and .the other having itsupper end coupled to said bell'crank, and means in operative relationwith a drive wheel for moving said movable member, substantially asdescribed. ln testimony whereof I have signed my jmme; in presence oftwo witnesses.

WILLIAM SHERMAN BROWN. ,W'itnessesf, I

' S. E lio ess, iGYBUsKiIIbIRi Go'pies 01 this patent may be obtain dfor fiveicentseach, by-addressiiig the Commissioner ofPatentswashingtontDhcpr

